public class demo {
    public static void main(String[] args) throws InterruptedException {
        Object locker1 = new Object();
        Object locker2 = new Object();
        Thread t1 = new Thread(()->{
           synchronized (locker1)
           {
               try {
                   Thread.sleep(1000);
               } catch (InterruptedException e) {
                   throw new RuntimeException(e);
               }
               synchronized (locker2) {
                   System.out.println("t1获得了两把锁");
               }
           }

        });
        Thread t2 = new Thread(()->{
           synchronized (locker2)
           {
               try {
                   Thread.sleep(1000);
               } catch (InterruptedException e) {
                   throw new RuntimeException(e);
               }
               synchronized (locker1) {
                   System.out.println("t2获得了两把锁");
               }
           }

        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();
    }
}
